TSV621 STMicroelectronics, TSV621 Datasheet - Page 14

• Manufacturer Part Number: TSV621
• Description: Micro-power CMOS op-amp
• Manufacturer: STMicroelectronics

Specifications of TSV621

• Low Supply Voltage: 1.5 V–5.5V
• Low Input Offset Voltage: 800 µV max (A version)
• Low Power Consumption: 29 µA typ
• Gain Bandwidth Product: 420 kHz typ
• Micropackages: SC70-5, SOT23-5
• Low Input Bias Current: 1 pA typ
• Extended Temperature Range: -40 to +125° C

Application information
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Optimization of DC and AC parameters
This device uses an innovative approach to reduce the spread of the main DC and AC
parameters. An internal adjustment achieves a very narrow spread of current consumption
(29 µA typical, min/max at ±17%). Parameters linked to the current consumption value, such
as GBP, SR and AVd benefit from this narrow dispersion. All parts present a similar speed
and the same behavior in terms of stability. In addition, the minimum values of GBP and SR
are guaranteed (GBP = 350 kHz min, SR = 0.15 V/µs min).
Driving resistive and capacitive loads
These products are micro-power, low-voltage operational amplifiers optimized to drive rather
large resistive loads, above 5 kΩ . For lower resistive loads, the THD level may significantly
increase.
In a follower configuration, these operational amplifiers can drive capacitive loads up to
100 pF with no oscillations. When driving larger capacitive loads, adding a small in-series
resistor at the output can improve the stability of the device (see
recommended in-series resistor values). Once the in-series resistor value has been
selected, the stability of the circuit should be tested on bench and simulated with the
simulation model.
Figure 20. In-series resistor vs. capacitive load
PCB layouts
For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible
to the power supply pins.
Doc ID 14912 Rev 2
TSV620, TSV620A, TSV621, TSV621A
Figure 20
for